EP3256068A1 - Création d'une base de cire ou de matière synthétique pour la production d'une prothèse dentaire - Google Patents

Création d'une base de cire ou de matière synthétique pour la production d'une prothèse dentaire

Info

Publication number
EP3256068A1
EP3256068A1 EP16701274.9A EP16701274A EP3256068A1 EP 3256068 A1 EP3256068 A1 EP 3256068A1 EP 16701274 A EP16701274 A EP 16701274A EP 3256068 A1 EP3256068 A1 EP 3256068A1
Authority
EP
European Patent Office
Prior art keywords
wax
base
oral cavity
prosthesis
physical model
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16701274.9A
Other languages
German (de)
English (en)
Other versions
EP3256068B1 (fr
Inventor
Novica Savic
Karl-Heinz Renz
Silke Maren GALL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kulzer GmbH
Original Assignee
Kulzer GmbH
Kulzer and Co GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kulzer GmbH, Kulzer and Co GmbH filed Critical Kulzer GmbH
Publication of EP3256068A1 publication Critical patent/EP3256068A1/fr
Application granted granted Critical
Publication of EP3256068B1 publication Critical patent/EP3256068B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/01—Palates or other bases or supports for the artificial teeth; Making same
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0022—Blanks or green, unfinished dental restoration parts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/10—Fastening of artificial teeth to denture palates or the like
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/10—Fastening of artificial teeth to denture palates or the like
    • A61C13/1003—Fastening of artificial teeth to denture palates or the like by embedding in base material
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/20—Methods or devices for soldering, casting, moulding or melting
    • A61C13/206—Injection moulding
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/34—Making or working of models, e.g. preliminary castings, trial dentures; Dowel pins [4]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/004—Means or methods for taking digitized impressions
    • A61C9/0046—Data acquisition means or methods
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H20/00—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance
    • G16H20/40—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture

Definitions

  • the invention relates to a method for producing a wax base or a prosthesis base for the manufacture of a dental prosthesis, in which a virtual CAD model of the dental prosthesis is used for producing the physical dental prosthesis or the prosthetic base, wherein from the CAD model of the dental prosthesis a virtual model of the Denture base is calculated.
  • the invention also relates to a wax base or prosthesis base, a wax assembly and a dental prosthesis made by such a method.
  • the common way is the analogous creation of dental prostheses.
  • an analogous method is currently used, in which an impression of the toothless jaw of the patient is first taken. From this impression, a plaster model of the patient situation is made.
  • a functional model of the prosthetic base made of wax (the wax base) is set up on the plaster model and fitted with prosthetic teeth. From this list, the wax base is then removed and transferred the list of artificial teeth in a final base made of plastic.
  • a cuvette is used as a mold or mold, with which the implanted with prosthetic teeth wax base is embedded. From the cured plaster mold, the wax is washed out with hot water, so that a cavity for the denture base of the prosthesis base is formed. By proceeding the denture teeth are already inserted into the mold. The mold is poured or stuffed with a gum-colored plastic, and during the casting process, the prosthetic teeth are connected to the denture base. After curing of the plastic, this is post-processed to obtain the desired shape.
  • prefabricated prosthetic teeth are usually set up manually and individually on the wax base on a plaster model of the edentulous jaw.
  • this wax prosthesis is embedded in the cuvette with gypsum, silicone or gel (depending on the later processing technique), and then, after curing of the potting material, releasing the wax base from the mold to create the cavity for the denture plastic.
  • the denture teeth remain in the embedding material.
  • a corresponding plastic is injected or poured into the cavity, thereby obtained after curing of the plastic dental prosthesis.
  • a CAD / CAM method for producing a dental prosthesis is known from WO 91/07141 A1, in which method a denture base based on an impression of a plastic block (a so-called Ronde) is milled.
  • Ronde a denture base based on an impression of a plastic block
  • the milled out denture base is only 2 to 3 mm thick.
  • the disadvantage is therefore a very high waste of material, which may be more than 90%, depending on the anatomical situation of each patient.
  • the milling out of such a large amount of material requires a corresponding amount of time and loads the milling tools, so that they consume faster and must be replaced.
  • the knowledge and skills of dental technicians can no longer or only poorly be used if all modeling steps are done exclusively on the computer to generate the CAD model.
  • the object of the invention is therefore to overcome the disadvantages of the prior art.
  • a method is to be provided with which a complex and time-consuming machining with milling is avoided.
  • the milling tools are to be spared and a quick production possible.
  • the simplest possible, complete and cost-effective production of the wax base, the denture base and the dental prosthesis should be possible. Furthermore, it is an object of the invention to provide a way by which the known methods of dental prosthesis production can be combined as well as possible with modern manufacturing processes to the available in the conventional production of dental prostheses know-how also in combination with modern CAD / CAM method usable do.
  • the invention also provides a wax base, a prosthesis base, a wax assembly and a finished dental prosthesis.
  • substructures such as implants, webs, anchoring devices and / or fastening means for fastening a hybrid prosthesis to such implants, webs and / or anchoring devices during manufacture or to take these into account.
  • the objects of the invention are achieved by a method for producing a wax base or a prosthesis base for the manufacture of a dental prosthesis, in which a virtual CAD model of the dental prosthesis is used for the production of the physical dental prosthesis or the physical prosthesis base, wherein from the CAD model of the dental prosthesis a virtual model of the denture base is calculated, characterized by the following chronological steps:
  • step D) calculating a virtual surface as a surface to be produced in the wax layer or in the plastic layer, the calculation being based on the virtual model of the denture base and the data set D1 and providing positioning aids for positioning prosthetic teeth in the surface to be generated; and E) Production of the wax base from the wax layer or the prosthesis base from the plastic layer with a subtractive CAM method on the basis of the virtual surface calculated in step D).
  • a scan or intraoral scan in the sense of the present invention is a 3D image of the scanned surface.
  • the scan or intra-oral scan can be done for example by a stereo recording with a stereo camera.
  • the physical model of the oral cavity situation preferably comprises a model of the upper jaw and the lower jaw as well as the relation of the two models to each other.
  • the method may also be performed with a physical model of the oral cavity situation that contains only one model of the maxilla or mandible or portions thereof.
  • the virtual CAD model of the dental prosthesis is preferably produced by scanning or measuring a physical model pair of the oral cavity situation of the upper jaw and the lower jaw and their relation to each other or the upper jaw and the lower jaw of the oral cavity situation and their relation to each other and then using a CAD Software the dental prosthesis is designed as a virtual CAD model. From the virtual CAD model of the dental prosthesis, a data set for the denture teeth and a data set for the denture base can be generated by computational separation. The latter data set for the denture base is then the virtual model of the denture base. The prosthetic base virtual model may then be used to create a physical prosthesis base of wax or plastic.
  • the wax layer or the plastic layer has a thickness of at least 3 mm, preferably a thickness between 5 mm and 15 mm, particularly preferably between 8 mm and 12 mm.
  • the invention also proposes a step C) between the steps
  • step C) the free surface of the wax layer or the plastic layer on the physical model of the oral cavity is at least partially scanned and the scan is processed to the second data set D2, wherein in the calculation of the virtual surface than the Surface in the wax layer or in the plastic layer based on the CAD model of the prosthesis base, based on the first data set D1 and based on the second data set D2.
  • the surface of the wax layer or the plastic layer is known, so that is removed in the subsequent subtractive CAM method only in the areas, or must be removed, in which really material (wax or plastic) is available for removal.
  • the production can be accelerated because it is known from the virtual models of the wax layer or the plastic layer, at which points is wax or plastic.
  • a part of the physical model of the oral cavity is additionally scanned in order to determine or ensure the exact positioning of the wax or plastic layer on the physical model of the oral cavity.
  • the surface which is produced in the wax layer or the plastic layer lies opposite the bearing surface of the wax layer or the plastic layer on the physical model of the oral cavity.
  • the positioning aids have a unique shape such that the position and the position of the prosthetic teeth is clearly defined to each other when the prosthetic teeth are surface-locked in the positioning of the prosthesis base or if the prosthetic teeth used surface-locking in the positioning of the wax base are.
  • the positioning aids are designed as toothed compartments.
  • Dental compartments are recesses in the prosthesis base or the wax base, with a shape suitable for receiving the denture teeth.
  • the toothed compartments particularly preferably have, in addition to a floor, a circumferential wall. The prosthetic teeth are then simply basally inserted into the wax prosthesis or basal glued into the denture base.
  • a positioning aids can be provided as an alternative to dental subjects and surveys on the wax base or denture base on which the denture teeth are inserted. Such surveys for realizing the positioning can be realized for example by cylindrical projections, on the type such as these are also provided on Lego ® TM stones (Lego ® -Stein principle).
  • the elevations or the positioning aids can also preferably have a non-rotationally symmetrical symmetry, in order to enable unambiguous axial positioning of the prosthetic teeth.
  • the size and height of the elevations, or more generally the shape of the positioning aids may be unique to each denture tooth to ensure unambiguous positioning and alignment of the denture teeth.
  • the wax base or prosthesis base is on the physical model of the oral cavity situation while the denture teeth are inserted into the positioning aids.
  • Particularly preferred embodiments of the present invention can provide that the production of the wax base from the wax layer or the preparation of the denture base from the plastic layer with a subtractive CAM method, while the wax layer or the plastic layer is disposed on the physical model of the oral cavity.
  • the pad which provides the physical model of the oral cavity, is particularly well-suited for stabilizing and positioning the wax base or denture base during processing.
  • the application of the wax layer or the plastic layer to the physical model of the oral cavity situation by means of preformed wax body, in particular with the help of at least one wax plate, or with the aid of soft preformed plastic body, in particular with help at least one plastic plate, and / or a impression tray is used for application to the physical model of the oral cavity.
  • the wax or plastic may have previously been softened, for example, by heating.
  • a soft plastic plate or a soft plastic body is understood to be one whose plastic deformability is sufficient to press the plastic to the desired surface of the physical model of the oral cavity situation upon manual application of force.
  • simple tools can be used.
  • a plurality of different impression trays which are suitable for different types or size ranges of oral cavity situations, can be used to apply the wax layer or the plastic layer to the physical model of the oral cavity situation.
  • the physical model of the oral cavity is obtained before step A) by an impression of the upper jaw and / or an impression of the upper jaw in the oral cavity of the patient, wherein preferably the impression is poured with gypsum or a plastic to form a plaster Model or a plastic model as a physical model to create the oral cavity situation.
  • known and proven methods for implementing the method according to the invention are brought into application.
  • a pair of models (upper and lower jaws) of plaster are made in relation to each other as a physical model of the oral cavity situation.
  • the relation of the model-pair can be adjusted by the use of an articulator.
  • the virtual CAD model of the dental prosthesis and / or the virtual model of the prosthesis base is generated by a CAD method on the basis of the data set D1 of the scan of the physical model of the oral cavity situation or the intraoral scan of the oral cavity situation becomes.
  • the physical model of the oral cavity situation intended and used anyway for the method is also used simultaneously for calculating the virtual model of the dental prostheses.
  • deviations between the virtual CAD model of the dental prosthesis and the wax base or denture base to be produced can thus be avoided.
  • a computer-controlled milling machine is used to implement the subtractive CAM method, preferably a computer-controlled 4-axis or 5-axis milling machine.
  • a hybrid prosthesis is to be manufactured from the wax base or the prosthesis base made of plastic, it can be provided according to the invention that at least one attachment means is arranged on the physical model of the oral cavity situation, in particular at the locations of the physical model of the oral cavity situation, to produce the wax base or prosthesis base is attached to the implants, or at least one fastener is attached to a rail and / or an anchoring device, which is or will be placed on the physical model of the oral cavity situation, in particular placed at the locations of the physical model of the oral cavity situation corresponding to implants and then in step B) the wax layer or the plastic layer is applied to the physical model of the oral cavity situation in such a way that the wax layer or the plastic layer is connected to the at least one fastening means.
  • the prosthesis base to be produced can be produced directly connected to the at least one fastening means.
  • the method according to the invention can then be used to manufacture a hybrid prosthesis. Implants, bars or other anchoring devices for the dental prosthesis can thus be taken into account with the method according to the invention.
  • the scan of the physical model of the oral cavity situation or the intraoral scan is performed with implants, with at least one inserted bridge and / or with at least one anchoring device on the physical model or in the oral cavity, particularly preferably with at least one of the implants, on the at least one inserted web and / or attached to the at least one anchoring device fastening means.
  • any substructures (implants, splint, anchoring devices, attachment means) under the wax base or plastic base can be detected by the scan or the intraoral scan and taken into account in the calculation of the virtual surface in step D).
  • step F) is carried out after step E):
  • step F) inserting denture teeth into the wax base positioning aids produced in step E) in the surface of the wax layer, for preparing the wax assembly, or inserting and securing, in particular gluing, denture teeth into the prosthesis base positioning aids which are inserted in step E) in the surface of the plastic layer were produced for the production of the dental prosthesis, wherein preferably the dental prosthesis is polished after insertion and fixing of the prosthetic teeth and / or the connection of the prosthetic teeth is cured to prosthesis base.
  • the objects underlying the present invention are achieved by a method for producing a dental prosthesis from a wax preparation, produced by such a method, wherein after step F) the wax preparation with the denture teeth is poured into a mold, the wax of the wax base is removed, in particular by melting the wax and dissolving the wax with water vapor leaving the prosthetic teeth in the mold and leaving the position and position of the prosthetic teeth unchanged in the mold, removing the wax from the wax base, in particular by melting the wax and dissolving out the wax with water vapor, wherein the denture teeth remain in the mold and the position and position of the denture teeth in the mold remain unchanged, the cavity formed in the mold is filled with a plastic, which forms the denture base of the dental prosthesis, the plastic is cured, preferably The prosthesis teeth are firmly connected to the plastic, the mold is opened and the dental prosthesis removed from the mold, wherein preferably the dental prosthesis is post-processe
  • the objects of the present invention are also achieved by a wax base or denture base made by such a method and by a dental prosthesis made by such a method.
  • the prosthetic teeth are preferably made of a plastic, more preferably of polymethyl methacrylate (PMMA).
  • the denture teeth may be single and / or in several groups contiguous or contiguous as complete rows of teeth. Connected denture teeth are firmly connected.
  • the plastic for producing the denture base preferably consists of a pink-colored or pink plastic and the denture teeth of a tooth-colored plastic.
  • the knowledge and craftsmanship available in dental laboratories can be usefully employed, especially if the denture teeth are initially placed on a wax base and the actual dental prosthesis is subsequently manufactured with a mold based thereon with the aid of a cuvette or if the plastic layer or the wax layer manually, with the reasonable knowledge of a dental technician is applied, which is able to estimate at what points of the physical model of the oral cavity material for the denture base or wax base is applied and where no material should be present and in what strength material is useful to apply.
  • the advantages that lower milling times are necessary that a lower material use of base material (wax or plastic) is necessary and that a conservation of the milling tools (less wear of the milling heads and the drive) is possible.
  • a larger number of prosthetic bases, wax bases and dental prostheses can be manufactured in the same time, which brings with the high cost, which causes a CAM milling machine in the acquisition benefits.
  • the bearing surface for the virtual model of the wax base or the plastic base can be taken directly from the patient or be determined from such a recording, so that the physical model of the oral cavity no longer needs to be scanned, since it produced from these data has been. Possible errors when taking an impression are eliminated.
  • hybrid prostheses can also be manufactured with the method according to the invention.
  • Hybrid prostheses are dental prostheses which are connected to implants inserted in the jaw.
  • webs may be connected to the implants which remain connected to the implants, the dental prosthesis being connected to the web via a plurality of clips as fastening means can be.
  • Other anchoring devices for attachment of hybrid prostheses are conceivable and applicable with the method according to the invention.
  • the approach underlying this invention is based on only one-sided processing of the wax base or plastic base, which particularly preferably takes place directly on the physical model of the oral cavity situation.
  • An exemplary method according to the invention may comprise the following method steps:
  • the support surface for the future dental prosthesis is of importance. It does not matter if the physical model is exclusively the pure mucosa or whether it includes the mucosa and already integrated prosthetic elements such as bars or implant abutments. Even existing teeth can be represented in the physical model, in which case a partial denture is made as a dental prosthesis.
  • a wax layer or plastic layer is adapted to the physical model.
  • the wax layer or plastic layer should have a thickness of at least 3 mm, but preferably about 10 mm.
  • C) The physical model of the oral cavity with the wax or plastic layer is now scanned again.
  • the wax base is important. This step C) can also be omitted, but is advantageous because it is known in the subsequent subtractive CAM method where the surface of the wax layer or the plastic layer begins and thus the milling head or the tool controlled the same or right in the right position can be brought to ablate the material. This can save time in the manufacture of the wax base or the prosthetic base made of plastic in the CAM device again.
  • the difference between the virtual model of the denture base and the scan of the physical model of the oral cavity with the wax layer or the plastic layer results in the volume to be removed by the CAM method (including the shape of the solid). Thus, it is determined which area of the wax layer or the plastic layer is removed.
  • the denture teeth are inserted into the tooth compartments or the positioning aids.
  • the finished wax base or dental prosthesis is removed from the physical model and used for patient try-in.
  • the procedure can be implemented in a similar manner if the oral cavity situation on the patient is initially recorded with an intra-oral scan and the physical model of the oral cavity situation is established on the basis of this intraoral scan.
  • abutments such as implants or bars inserted in the patient's oral cavity must be realized by the physical model, or the abutments (especially fasteners) are placed on the physical model to be integrated into the wax layer or plastic layer.
  • an additional scan of the physical model of the oral cavity situation with applied or fastened fasteners takes place and is used as data set D1.
  • Figure 1 is a perspective view of a prosthetic base or wax base for a lower jaw without prosthetic teeth, as it results from the virtual model of the prosthesis base and as it results in performing a method according to the invention; and FIGS. 2 to 5: the chronological sequence of a method according to the invention is constructed on the basis of a prosthesis or wax base based on a physical model of the oral cavity situation shown schematically in cross section.
  • FIG. 1 shows a schematic perspective view of a wax base 1 or a prosthesis base 1 made of plastic and having a method according to the invention and intended for producing a wax installation according to the invention or a dental prosthesis according to the invention.
  • the virtual model of the prosthesis base can also be represented in FIG. If the prosthesis base 1 is made of plastic, it consists of a pink-colored plastic. The color and transparency is chosen to match a gum look.
  • a plurality of tooth compartments 2 are provided for the fixation of denture teeth (not shown in FIG. 1).
  • the toothed trays 2 are formed as depressions in the jaw saddle of the wax base 1 or prosthesis base 1.
  • the toothed compartments 2 can have an indexing, so that the denture teeth are to be inserted only in a specific orientation region in the wax base 1 or the prosthesis base 1 and, if possible, each denture tooth fits only to a specific toothed compartment 2.
  • the tooth compartments 2 have elevations centrally arranged elevations, which correspond to corresponding recesses in the basal ends of the prosthetic teeth (not shown in Figure 1). As a result, it can be specified even more clearly and more identifiable which denture teeth should be placed in which toothed compartments 2 and in which orientation the denture teeth should be inserted into the tooth compartments 2.
  • the surveys can namely serve as indexings with suitable symmetry breaking. In addition, a more stable connection of the wax base 1 or the prosthesis base 1 to the prosthetic teeth can thus be generated.
  • Figures 2 to 5 show the chronological sequence of a method according to the invention based on a schematically shown in cross-section physical model of the oral cavity situation on a denture base or wax base and later a wax installation or a dental prosthesis is constructed.
  • the illustrated cross-sectional plane lies in a plane parallel to the frontal plane of the patient.
  • FIG. 2 shows the scanning of a physical model 4 of a toothless upper jaw of a patient.
  • the physical model 4 was previously produced by means of an impression and a tray and pouring the molded impression.
  • the molded impression material is poured out with gypsum, so that a plaster model 4 is obtained.
  • the mandibular arch 6 or the alveolar ridge 6 and the palate 8 of the oral cavity situation of the patient can be seen.
  • the physical model 4 is set up or fixed in a defined position and then the surface of the physical model 4 is recorded with a scanner 10.
  • the scanner 10 and / or the model 4 can be moved relative to each other, so that all relevant areas of the surface of the model 4, ie in particular the surfaces on which the prosthesis base or the wax base or the dental prosthesis is to rest later, can be recorded.
  • the data D1 resulting from the scan is stored.
  • the oral cavity situation of the patient can be recorded with the help of an intraoral scan.
  • the data record D1 is then calculated from the intra-oral scan or determined on the basis thereof. It also obvious errors in the model, which are graphically recognizable for example on a screen by the user, be removed manually by the user.
  • the data of the intraoral scan are then additionally used to generate a virtual CAD model of the oral cavity situation and of a physical model 4 of the oral cavity situation to be generated. With a suitable CAM method, the physical model 4 of the oral cavity situation is then produced generatively or subtractive.
  • Data D1 whether obtained from a Model 4 scan or from the intraoral scan, can then be used to create the virtual model of the dental prosthesis to be made using a CAD technique.
  • a wax layer 12 or a plastic layer 12 is applied to the physical model 4, that is, a base plate 12 made of wax or plastic on the physical model 4 adapted. This is shown in FIG.
  • the wax layer 12 or plastic layer 12 has a thickness of 10 mm and is thus in any case thicker than the wax base 1 or prosthesis base 1 to be produced at its thickest point. This ensures that later no material is missing at any point of the wax base 1 or prosthesis base 1 to be produced.
  • the wax layer 12 or the plastic layer 12 rests on the mandibular arch 6 or alveolar ridge 6 and the palate 8 of the physical model 4 of the oral cavity, which provides the user with the relevant anatomical structures of the oral cavity of the patient.
  • the physical model 4 stably holds the layer 12 and later the wax base 1 or prosthesis base 1 fabricated therefrom.
  • a corresponding model (not shown) of the lower jaw is used.
  • the scanner 10 the surface of the model 4 with the wax layer 12 or plastic layer 12 is now scanned thereon (shown in FIG. 3). In this case, the entire surface of the wax layer 12 or plastic layer 12 is received, which is opposite to the support surface on the physical model 4. This scan is saved as record D2.
  • the virtual model of the denture base and the data D2 of the surface of the wax layer 12 or the plastic layer 12 on the physical model 4 is then calculated how much material (wax or plastic) and where the material of the Wax layer 12 or plastic layer 12 must be removed and stored this result as a record D3.
  • the wax layer 12 or plastic layer 12 is machined or milled while still resting on the physical model 4 with a computer-controlled mill 14 (for example a computer-controlled 4-axis mill or 5-axis mill).
  • a computer-controlled mill 14 for example a computer-controlled 4-axis mill or 5-axis mill.
  • the physical model 4 of the oral cavity situation and the wax layer 12 or plastic layer 12 are fastened and fixed on a holder (not shown) of the computer-controlled milling machine 14.
  • the processing at a very advanced stage is shown in FIG.
  • toothed trays 2 are also produced in the wax base 1 or prosthesis base 1.
  • Such a finished wax base 1 or prosthesis base 1 with the toothed trays 2 is shown in FIG.
  • the cut denture teeth 1 6 are here designed as molars or formed as molar prostheses.
  • the denture teeth 1 6 are made of a hard white plastic with a matching for teeth or teeth of the patient's coloring and transparency.
  • Each prosthetic tooth 16 has a coronal or occlusal surface 18 (occlusal surface) and a basal surface 20.
  • the basal surface 20 is fixed in the dental compartments 2.
  • the tooth compartments 2 are the basal counterparts of the basal sides 20 of the denture teeth 1 6. Before the first insertion of the denture teeth 1 6 in the tooth compartments 2 in the prosthetic base 1 made of plastic, the tooth compartments 2 and the denture teeth 16 (at least the basal sides 20 of Denture teeth 1 6) cleaned and roughened to improve the compound with a solvent and swollen and then connected with an adhesive.
  • Protruding excess residues of the adhesive may be removed before curing and / or after curing.
  • the finished dental prosthesis or the wax installation can then be used for fitting the patient.
  • the wax installation (wax base 1 with inserted denture teeth 12) still offers far-reaching possibilities for correction by the dental technician and / or the dentist.
  • a dental prosthesis is produced by known methods using a cuvette as a mold and by removing the wax from the mold by filling the cavity with the denture teeth 12 fixed therein with plastic and bonding it to the prosthetic teeth 12. A post-processing of the finished dental prosthesis (polishing and deburring) can then be found.
  • the method according to the invention can also be applied to printed denture teeth or rows of dentures, but is preferably carried out with prefabricated denture teeth which can be previously basally shortened manually or with an automatic milling method.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)

Abstract

L'invention concerne un procédé de préparation d'une base de cire (1) ou d'une base de prothèse (1) pour réaliser une prothèse dentaire, procédé dans lequel un modèle CAO virtuel de la prothèse dentaire est utilisé pour fabriquer la prothèse dentaire physique ou la base de prothèse physique (1) ; un modèle virtuel de la base de prothèse (1) est calculé à partir du modèle CAO de la prothèse dentaire. L'invention est caractérisée par les étapes chronologiques suivantes consistant : A) à balayer au moins une région tridimensionnelle d'un modèle physique (4) de la situation de la bouche d'un patient et créer un ensemble de données D1 sur la base de ce balayage ou effectuer un balayage intra-oral d'une région tridimensionnelle de la situation de la bouche du patient et réaliser un modèle physique (4) de la situation de la bouche d'un patient sur la base du balayage intra-oral et créer un ensemble de données D1 sur la base du balayage intra-oral ; B) appliquer une couche de cire (12) ou une couche de matière synthétique (12) sur le modèle physique (4) de la situation de la bouche ; D) calculer une surface virtuelle en tant que surface à générer dans la couche de cire (12) ou dans la couche de matière synthétique (12), le calcul étant effectué sur la base du modèle virtuel de la base de prothèse (1) et de l'ensemble des données D1 et des auxiliaires de positionnement (2) étant prévus dans la surface à générer pour positionner des dents (16) la prothèse ; et E) réaliser la base de cire (1) à partir de la couche de cire (12) ou la base de prothèse (1) à partir de la couche de matière synthétique (12) à l'aide un procédé CAM soustractif en fonction de la surface virtuelle calculée à l'étape D). L'invention concerne également un procédé de fabrication d'une prothèse dentaire ou d'un modèle en cire d'une prothèse dentaire et une base de prothèse, une base de cire ou une prothèse dentaire fabriquée avec un tel procédé.
EP16701274.9A 2015-02-11 2016-01-20 Création d'une base de cire ou de matière synthétique pour la production d'une prothèse dentaire Active EP3256068B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015101978.7A DE102015101978B3 (de) 2015-02-11 2015-02-11 Erstellen einer Wachs- oder Kunststoffbasis zur Fertigung einer Dentalprothese
PCT/EP2016/051082 WO2016128192A1 (fr) 2015-02-11 2016-01-20 Création d'une base de cire ou de matière synthétique pour la production d'une prothèse dentaire

Publications (2)

Publication Number Publication Date
EP3256068A1 true EP3256068A1 (fr) 2017-12-20
EP3256068B1 EP3256068B1 (fr) 2018-10-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16701274.9A Active EP3256068B1 (fr) 2015-02-11 2016-01-20 Création d'une base de cire ou de matière synthétique pour la production d'une prothèse dentaire

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Country Link
US (1) US20180042709A1 (fr)
EP (1) EP3256068B1 (fr)
DE (1) DE102015101978B3 (fr)
WO (1) WO2016128192A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016119598B4 (de) * 2016-10-14 2019-09-12 Heraeus Kulzer Gmbh In Wachs eingebetteter vorgeformter Prothesenbasisrohling
DE102017108592B4 (de) * 2017-04-21 2018-12-27 Heraeus Kulzer Gmbh Verfahren zur Herstellung einer Dentalprothese mit parallelen Wurzeln der Prothesenzähne
DE102018101663B4 (de) * 2018-01-25 2020-12-31 Kulzer Gmbh Verfahren zur Herstellung einer Dentalprothese
DE102018101664B4 (de) * 2018-01-25 2019-08-14 Kulzer Gmbh Verfahren zur Herstellung einer Dentalprothese
FR3079736B1 (fr) * 2018-04-04 2021-09-10 Tout Dentaire Procede de fabrication d'un appareil dentaire
US11612462B2 (en) * 2020-08-24 2023-03-28 Dio Corporation Method of implanting dental restoration

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Publication number Priority date Publication date Assignee Title
WO1991007141A1 (fr) * 1989-11-20 1991-05-30 Wolfgang Becker Procede de fabrication d'une prothese dentaire
US7027642B2 (en) * 2000-04-28 2006-04-11 Orametrix, Inc. Methods for registration of three-dimensional frames to create three-dimensional virtual models of objects
US7236842B2 (en) * 2004-12-02 2007-06-26 Cadent Ltd. System and method for manufacturing a dental prosthesis and a dental prosthesis manufactured thereby
US8932058B2 (en) * 2005-11-30 2015-01-13 3Shape A/S Impression scanning for manufacturing of dental restorations
SE530773C2 (sv) * 2005-12-30 2008-09-09 Nobel Biocare Services Ag Förfarande för framställning av dental komponent
DE102007002178A1 (de) * 2007-01-03 2008-07-10 Aepsilon Rechteverwaltungs Gmbh Verfahren betreffend die Modellierung und Herstellung von einem künstlichen Gebiss
DE102009028666B3 (de) * 2009-08-19 2011-02-17 Ernst-Moritz-Arndt-Universität Vollkeramischer Zahnersatz und Verfahren zu dessen Herstellung sowie Verfahren zur Herstellung von Körperersatzteilen
DE102009056752C5 (de) * 2009-12-04 2024-04-04 Kulzer Gmbh Herstellung individueller dentaler Prothesen via CAD/CAM und Rapid Manufacturing/Rapid Prototyping aus Daten der digitalen Abdrucknahme
DE102010064142B4 (de) * 2010-12-23 2019-06-13 BEGO Bremer Goldschlägerei Wilh. Herbst GmbH & Co. KG Einbettmasse zur Verwendung in einem Verfahren zur Herstellung einer Dental-Restauration mittels CAD-Cast-Verfahren
DE102011004551B4 (de) * 2011-02-22 2014-05-22 Bego Medical Gmbh Verfahren zur Herstellung einer Anzahl dentaler Restaurationen
DE102013003913A1 (de) * 2013-03-07 2014-09-11 Amann Girrbach Ag Verfahren zur Herstellung einer Prothesenbasis
US9687327B2 (en) * 2013-03-14 2017-06-27 Anthony Prestipino Apparatuses and methods for making a final hybrid prosthesis to be attached to dental implants
DE102013211154B4 (de) * 2013-06-14 2021-06-10 Kulzer Gmbh Verfahren zur Herstellung eines Gebisses

Also Published As

Publication number Publication date
DE102015101978B3 (de) 2016-07-14
EP3256068B1 (fr) 2018-10-17
WO2016128192A1 (fr) 2016-08-18
US20180042709A1 (en) 2018-02-15

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